Add version info to layout files to avoid exception when AvalonDock version has changed.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5212 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

data/layouts/Debug.xml

@@ -1,4 +1,4 @@
-<DockingManager>
+<DockingManager version="1.2.1">
     <ResizingPanel ResizeWidth="*" ResizeHeight="*" EffectiveSize="1076,904.08" Orientation="Vertical">
         <ResizingPanel ResizeWidth="*" ResizeHeight="*" EffectiveSize="1257.04,717.08" Orientation="Horizontal">
             <DockablePane ResizeWidth="200" ResizeHeight="*" EffectiveSize="200,717.08" Anchor="Left">

data/layouts/Default.xml

@@ -1,4 +1,4 @@
-<DockingManager>
+<DockingManager version="1.2.1">
     <ResizingPanel ResizeWidth="*" ResizeHeight="*" EffectiveSize="0,0" Orientation="Horizontal">
         <DockablePane ResizeWidth="200" ResizeHeight="*" EffectiveSize="200,904.08" Anchor="Left">
             <DockableContent Name="ICSharpCode_SharpDevelop_Project_ProjectBrowserPad" AutoHide="false" />

data/layouts/Plain.xml

@@ -1,4 +1,4 @@
-<DockingManager>
+<DockingManager version="1.2.1">
     <DocumentPanePlaceHolder />
     <Hidden />
     <Windows />

src/Libraries/AvalonDock/DockingManager.cs

@@ -2714,6 +2714,8 @@ namespace AvalonDock
                 SaveLayout(stream);
         }
 
+        const string layoutFileVersion = "1.2.1";
+        
         /// <summary>
         /// Send layout configuration to a <see cref="XmlTextWriter"/> object
         /// </summary>
@@ -2725,6 +2727,7 @@ namespace AvalonDock
                 throw new InvalidOperationException("Unable to serialize docking layout while DockingManager control is unloaded");
 
             sw.WriteStartElement("DockingManager");
+            sw.WriteAttributeString("version", layoutFileVersion);
 
             if (Content is ResizingPanel)
                 SaveLayout(sw, Content as ResizingPanel);
@@ -3032,6 +3035,9 @@ namespace AvalonDock
                 Debug.Assert(false, "Layout file hasn't a valid structure!");
                 throw new InvalidOperationException("Layout file had not a valid structure!");
             }
+            
+            if (doc.DocumentElement.GetAttribute("version") != layoutFileVersion)
+                throw new FileFormatException("Unsupported layout file version");
 
             if (doc.DocumentElement.ChildNodes.Count != 3 ||
                 (doc.DocumentElement.ChildNodes[0].Name != "ResizingPanel" && doc.DocumentElement.ChildNodes[0].Name != "DocumentPanePlaceHolder") ||

src/Main/Base/Project/Src/Gui/Workbench/Layouts/AvalonDockLayout.cs

@@ -204,12 +204,7 @@ namespace ICSharpCode.SharpDevelop.Gui
 				return;
 			Busy = true;
 			try {
-				bool isPlainLayout = LayoutConfiguration.CurrentLayoutName == "Plain";
-				if (File.Exists(LayoutConfiguration.CurrentLayoutFileName)) {
-					LoadLayout(LayoutConfiguration.CurrentLayoutFileName, isPlainLayout);
-				} else if (File.Exists(LayoutConfiguration.CurrentLayoutTemplateFileName)) {
-					LoadLayout(LayoutConfiguration.CurrentLayoutTemplateFileName, isPlainLayout);
-				}
+				TryLoadConfiguration();
 			} catch (Exception ex) {
 				MessageService.ShowException(ex);
 				// ignore errors loading configuration
@@ -221,6 +216,22 @@ namespace ICSharpCode.SharpDevelop.Gui
 			}
 		}
 		
+		void TryLoadConfiguration()
+		{
+			bool isPlainLayout = LayoutConfiguration.CurrentLayoutName == "Plain";
+			if (File.Exists(LayoutConfiguration.CurrentLayoutFileName)) {
+				try {
+					LoadLayout(LayoutConfiguration.CurrentLayoutFileName, isPlainLayout);
+					return;
+				} catch (FileFormatException) {
+					// error when version of AvalonDock has changed: ignore and load template instead
+				}
+			}
+			if (File.Exists(LayoutConfiguration.CurrentLayoutTemplateFileName)) {
+				LoadLayout(LayoutConfiguration.CurrentLayoutTemplateFileName, isPlainLayout);
+			}
+		}
+		
 		void LoadLayout(string fileName, bool hideAllLostPads)
 		{
 			LoggingService.Info("Loading layout file: " + fileName + ", hideAllLostPads=" + hideAllLostPads);